forked from detekt/detekt
/
SafeCastSpec.kt
86 lines (78 loc) · 2.28 KB
/
SafeCastSpec.kt
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package io.gitlab.arturbosch.detekt.rules.style
import io.gitlab.arturbosch.detekt.test.assertThat
import io.gitlab.arturbosch.detekt.test.compileAndLint
import org.junit.jupiter.api.Test
class SafeCastSpec {
val subject = SafeCast()
@Test
fun `reports negated expression`() {
val code = """
fun test(element: Int) {
val cast = if (element !is Number) {
null
} else {
element
}
}
""".trimIndent()
assertThat(subject.compileAndLint(code)).hasSize(1)
}
@Test
fun `reports expression`() {
val code = """
fun test(element: Int) {
val cast = if (element is Number) {
element
} else {
null
}
}
""".trimIndent()
assertThat(subject.compileAndLint(code)).hasSize(1)
}
@Test
fun `reports negated expression with no braces`() {
val code = """
fun test(element: Int) {
val cast = if (element !is Number) null else element
}
""".trimIndent()
assertThat(subject.compileAndLint(code)).hasSize(1)
}
@Test
fun `reports expression with no braces`() {
val code = """
fun test(element: Int) {
val cast = if (element is Number) element else null
}
""".trimIndent()
assertThat(subject.compileAndLint(code)).hasSize(1)
}
@Test
fun `does not report wrong condition`() {
val code = """
fun test(element: Int) {
val other = 3
val cast = if (element == other) {
element
} else {
null
}
}
""".trimIndent()
assertThat(subject.compileAndLint(code)).isEmpty()
}
@Test
fun `does not report wrong else clause`() {
val code = """
fun test(element: Int) {
val cast = if (element is Number) {
element
} else {
String()
}
}
""".trimIndent()
assertThat(subject.compileAndLint(code)).isEmpty()
}
}